Visual Basic Password Cracker

Learn how to create a simple password cracking program using Visual Basic 6

Understanding Password Cracking

This Visual Basic 6 program demonstrates a basic password cracking technique using a brute-force approach. It generates possible password combinations and compares each with the actual password until a match is found.

Important Security Note

This program is for educational purposes only. Password cracking without authorization is illegal and unethical. Understanding these concepts helps in creating stronger security measures, not in compromising systems.

How It Works

The program uses a timer to repeatedly generate random password combinations and compare them to the target password. When a match is found, the timer stops and indicates a successful login.

Key Concepts

  • Brute-force attack simulation
  • Random password generation
  • Timer-based iteration
  • Character encoding using ASCII
  • Basic security principles

Implementation Details

1

Password Generation

The program generates random alphanumeric characters using the ASCII character set (codes 33 to 126). The formula used is:

Int(Rnd * 93) + 33

This covers all printable characters except space, including letters, numbers, and symbols.

2

Timer Mechanism

A timer control is used to repeatedly execute the password generation and checking process. The interval property determines how frequently new passwords are generated:

  • 1 = 1 millisecond
  • 1000 = 1 second

The timer is disabled by default and only enabled when the user clicks the "Crack Password" button.

3

Matching Process

Each generated password is compared to the actual password. If they match, the timer is disabled and success is indicated. If not, the process continues with the next generated password.

Algorithm Flow

Start

User clicks "Crack Password" button

Generate

Create random password

Compare

Test against actual password

Repeat

Continue until match found

Stop Timer

When password is cracked

Success

Display cracked password

Video Demonstration

See the password cracker in action with this video demonstration:

VB6 Code Implementation

The complete Visual Basic 6 code for the password cracker program:

Password Cracker Code 
' Declare variables
Dim crackpass As String
Dim password As String
Dim secretword As String
Dim num1 As Integer
Dim num2 As Integer
Dim num3 As Integer

' Start cracking process
Private Sub Command1_Click()
    Timer1.Enabled = True
End Sub

' Initialize the actual password
Private Sub Form_Load()
    password = "@#4"  ' Set your target password here
End Sub

' Timer event for password generation and checking
Private Sub Timer1_Timer()
    ' Generate three random ASCII characters
    num1 = Int(Rnd * 93) + 33
    num2 = Int(Rnd * 93) + 33
    num3 = Int(Rnd * 93) + 33
    
    ' Combine characters to form password
    crackpass = Chr(num1) & Chr(num2) & Chr(num3)
    
    ' Display generated password
    Text1.Text = crackpass
    
    ' Check if password matches
    If crackpass = password Then
        ' Stop timer on success
        Timer1.Enabled = False
        ' Update status
        Label1.Visible = True
        Label1.Caption = "Password Cracked! Login Successful!"
    Else
        ' Continue searching
        Label1.Visible = True
        Label1.Caption = "Testing passwords... Please wait"
    End If
End Sub

Note: This is a simplified demonstration. Real password cracking requires more sophisticated techniques and significant computational power for longer passwords.

@#4

Security Learning Resources

Expand your knowledge with these related topics:

Password Security

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Encryption Techniques

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VB6 Security

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